The intense round of thunder and lightning that rocked the north state Monday night continued Tuesday, keeping north state firefighters busy battling small fires in Shasta, Siskiyou and Tehama counties.

Lightning from overnight storms sparked at least 21 fires, ten of which were in the Burney area.

A fire near Shasta Dam and the Digger Bay area burned a quarter acre and was the largest of the reported lightning-caused fires, said Linda Galvan of the California Department of Forestry and Fire Protection.

Fires were also reported on Smith Logging Road and Reiser Mountain Road near Round Mountain. A fire near Allie Cove on the Pit River arm of Lake Shasta could only be reached by boat, Galvan said.

A total of 21 lightning fires have been reported since Monday, Galvan said.

All of those fires, except for one that couldn't be found, were either contained or staffed as of Tuesday evening, she said.

"Most of them are just large spots," she said.

Most of the lightning strikes were concentrated in eastern Shasta County, so Cal Fire is focused on the Intermountain area, Galvan said.

Cal Fire sent planes up throughout the day to look for any new fires and extra firefighters and engines have been on duty since last week, she said.

Lightning strikes started two small fires in Siskiyou County – both less than a quarter acre – that were contained as of 6:30 a.m. One of the blazes was just outside McCloud. The other fire was in the area of Pondosa near the Shasta-Siskiyou County line.

Suzi Brady, a spokeswoman for Cal Fire in Siskiyou County, said no additional fires had been reported by 3:45 p.m., but lightning was already starting to strike.

No fires were reported this morning in Tehama County, according to a Cal Fire spokeswoman.

Anderson firefighters quickly extinguished two fires just before midnight Monday that sparked near the Shasta District Fair grounds.

Shasta-Trinity National Forest officials said they recorded 694 lightning strikes, resulting in nine small fires in remote areas near Shasta Lake. They anticipated more lightning throughout the night.

National Weather Service forecasters say the rest of the week should be calm. Today's high is expected to be near 95 degrees while temperatures will drop into the high 80s by Friday.

Mostly sunny conditions are expected through the weekend.

While there aren't any storms forecasted through next week, Galvan said more lighting-sparked fires could be reported as the area dries out. Areas hit by lightning can smolder and smoke until fuels dry out enough to spark flames, she said.